A simulation model for predicting surface integrity coupled thermal-mechanical effect in turning of Inconel 718 super alloy

作者：Ren, Xiaoping; Liu, Zhanqiang^*

来源：International Journal of Advanced Manufacturing Technology, 2019, 100(5-8): 1825-1837.

DOI：10.1007/s00170-018-2704-4

• Residual stress
• Microstructure
• Thermal-mechanical loading
• Inconel 718
• Turning

Residual stress as well as microstructure modification in machined surface layer directly influence fatigue performance of difficult-to-machine materials especially for nickel-based super alloy. However, the prediction of these factors still needs deeper study. In the paper, residual stress as well as microstructure modification in machined surface is predicted by a simulation model coupling thermal-mechanical effect. The predictions of FE model are validated by experimental measurements. Through numerical simulation results, the effects of thermal and mechanical loadings are distinguished. Besides, the influence of cutting parameters on the residual stress and microstructure was also obtained. Within the range of experimental parameters, the combination of larger cutting speed and lower feed rate is the recommended optimized selection of cutting parameters to obtain the better surface quality in turning Inconel 718.

• 出版日期2019-2
• 单位山东大学